The Efficacy of Immunodetection Point Inhibitors for Advanced Esophageal Cancer

Esophageal cancer is one of the most common malignancies of the digestive system. Esophageal squamous cell carcinoma is the main type of esophageal cancer, accounting for more than 90% of esophageal cancer in China. The 5-year survival rate is about 15%\~25%. Many patients with esophageal cancer are initially diagnosed as advanced, and many patients with early initial diagnosis will still relapse and metastasis after radical treatment. Currently, chemotherapy plays a central role in palliative care, but its objective remission rate is only 20-40%, and the median survival is about 8-10 months. However, most of the current phase III studies on targeted drugs for esophageal squamous cell carcinoma have failed, and the treatment of esophageal squamous cell carcinoma has entered the bottleneck stage. Therefore, it is urgent to explore a treatment method that can significantly improve the prognosis of patients with esophageal cancer. In recent years, with the development of biological immunotherapy, immunocheckpoint inhibitors, including pd-1 inhibitors, pd-l1 inhibitors and ctla-4 inhibitors, have achieved significant curative effect and made breakthroughs in the treatment of multiple solid tumors including melanoma, non-small cell lung cancer and kidney cancer. These immunocheckpoint inhibitors have also been tried for esophageal cancer, with initial success in immunotherapy for esophageal cancer. In this observational study, all patients with esophageal cancer who used immunocheckpoint inhibitors in clinical practice were included, without limitation on the number of treatment lines or combinations of different chemotherapy. Through follow-up observation, the purpose of this study was to analyze the efficacy of immunocheckpoint inhibitors for esophageal cancer in the real world, and to explore the differences in the efficacy of immunocheckpoint inhibitors in different stages of treatment, as well as the efficacy of different chemotherapy combinations, so as to provide clinical evidence for the use of immunotherapy for advanced esophageal cancer.

Sex

All

Minimum age

18 Years

Maximum age

80 Years

Inclusion Criteria:

1. age above 18, male or female.
2. patients with esophageal cancer confirmed by pathology through tumor biopsy or puncture tissue.
3. the patient was assessed as untreatable by surgery.
4. patients received second-line or third-line chemotherapy and were treated with immunodetector point inhibitors.
5. the patient had complete preliminary pathological information, tumor site, pathological type and other information.
6. the patient must have adequate tumor tissue or 5-10 FFPE white tablets to provide; After treatment, patients were returned to the hospital for re-examination every 3 treatment cycles, and plasma and peripheral blood samples could be obtained during the whole process.
7. other indicators of the patients met the general clinical trial enrollment conditions.
8. subjects read and fully understand the instructions to patients, and sign the informed consent.

Exclusion Criteria:

1. blood samples cannot be obtained before treatment.
2. the patient has clear infection status.
3. the patient has other serious diseases besides esophageal cancer.

(5) current patients with alcoholism or drug abuse. (6) pregnant female patients. (7) the patient has a clear history of neurological or mental disorders.